Screen Interface
Display-to-Mainboard Interface Types (e.g., MIPI, LVDS, etc.)
In body cameras and embedded systems, the screen interface refers to the electrical and data connection between the display panel and the device's mainboard. The choice of interface type significantly affects display performance, power consumption, signal integrity, and the complexity of PCB design.
1. Common Screen Interface Types
| Interface Type | Full Name | Features | Typical Use Case |
|---|---|---|---|
| MIPI DSI | Mobile Industry Processor Interface – Display Serial Interface | High-speed, low-power, serial interface; supports high resolution and refresh rate | Widely used in smartphones, compact devices, and modern body cameras |
| LVDS | Low-Voltage Differential Signaling | Parallel interface; good signal integrity over longer distances; moderate power consumption | Used in larger screens or legacy systems |
| RGB | Red-Green-Blue Parallel Interface | Simple design, easy to implement; limited resolution support | Entry-level or small-size displays |
| SPI | Serial Peripheral Interface | Low-speed serial interface; suitable for basic status or small monochrome displays | Secondary/status screens |
| eDP | Embedded DisplayPort | Advanced interface for high-performance displays; less common in compact devices | High-end, large-format applications |
2. Interface Selection Considerations
Compatibility with Mainboard Chipsets: Choice depends on the supported interface of the camera’s main SoC or MCU.
Display Resolution & Refresh Rate: MIPI supports higher resolutions with fewer wires; LVDS better for mid-range displays.
Power Consumption: MIPI is more power-efficient, which is critical for battery-powered body cameras.
PCB Layout Complexity: MIPI and LVDS require precise impedance control; RGB is simpler but limited in capability.
Cost & Availability: RGB and SPI are low-cost; MIPI increasingly cost-effective with modern ICs.